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13 September 1989 Frequency Chirp Of A Low-Pressure Hybrid TE CO2 Laser
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Abstract
The frequency chirp in the output of a hybrid TE CO2 laser has been measured using a heterodyne technique. Due to the low operating pressure of about 35 Torr, laser kinetic and hydrodynamic processes differ considerably in time scale from those in regular TEA CO2 lasers. We have observed that the chirps in laser pulses up to 150 μs long could not be described adequately with existing theories. Almost complete cancellation of the laser chirp was achieved by appropriate use of acousto-optic modulators external to the hybrid TE CO2 laser. The operating and output characteristics of this laser and other parameters related to chirp will be discussed.
© (1989) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
R. S. Eng, J. G. Grimm, C. Freed, and R. G. O'Donnell "Frequency Chirp Of A Low-Pressure Hybrid TE CO2 Laser", Proc. SPIE 1103, Laser Radar IV, (13 September 1989); https://doi.org/10.1117/12.960557
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